You can buy invisible elastic bands online or from magic stores.
You can also choose 2 strangers if people watching you don’t know one another.
Another option is to use a blindfold on the person who has their eyes closed if you want to be absolutely certain they cannot see.
Don’t touch the person who has their eyes closed by accident or else you may spoil the rest of your trick.
Lightly touch the end of the playing card against their nose so you don’t accidentally give them a papercut.
Make sure that you thank your volunteers for helping you before they sit back down.
